Grain to Ounce Converter 2025 - gr to oz Calculator | Thiyagi

Grain to Ounce Converter

Convert between grains and ounces for pharmaceutical measurements, precious metals, and precision weight calculations

1 gr = 0.002286 oz
1 oz = 437.5 gr
Enter a value to see the conversion result

Apothecary Weight Reference

Grains ⇔ Ounces
1 gr ⇔ 0.002286 oz
60 gr ⇔ 0.137 oz
120 gr ⇔ 0.274 oz
218.75 gr ⇔ 0.5 oz
437.5 gr ⇔ 1 oz
875 gr ⇔ 2 oz

Precision Measurement Examples

Pharmaceutical:
• Aspirin tablet: 5 grains (325 mg)
• Medicine dosage: 1-10 grains
• Vitamin supplement: 2-15 grains
• Homeopathic dose: 0.1-1 grain
Precious Metals:
• Gold jewelry: 480-960 grains/oz troy
• Silver coin: 400-450 grains
• Gemstone weight: 1-100 grains
• Gold dust: measured in grains
Historical Uses:
• Gunpowder charge: 60-120 grains
• Arrow weight: 300-500 grains
• Bullet weight: 55-180 grains
• Apothecary measurements

Weight Units

  • Grain: 1/7000 pound avoirdupois
  • Ounce: 1/16 pound avoirdupois
  • Conversion: 1 oz = 437.5 grains
  • Mass: 1 grain = 64.79891 mg

Usage Tips

  • Grains for precise dosing
  • Ounces for general weight
  • 437.5:1 ratio exact
  • Traditional apothecary unit

Applications

  • Pharmacy: Drug dosage
  • Jewelry: Precious metal weight
  • Ballistics: Projectile weight
  • Science: Precise measurements